38891398 has 48 divisors (see below), whose sum is σ = 74118240. Its totient is φ = 15212736.

The previous prime is 38891389. The next prime is 38891399. The reversal of 38891398 is 89319883.

38891398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38891399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 436938 + ... + 437026.

It is an arithmetic number, because the mean of its divisors is an integer number (1544130).

Almost surely, 2^38891398 is an apocalyptic number.

38891398 is a deficient number, since it is larger than the sum of its proper divisors (35226842).

38891398 is an frugal number, since it uses more digits than its factorization.

38891398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 111 counting only the distinct ones).

The product of its digits is 373248, while the sum is 49.

The square root of 38891398 is about 6236.2968178239. The cubic root of 38891398 is about 338.8060718808.

The spelling of 38891398 in words is "thirty-eight million, eight hundred ninety-one thousand, three hundred ninety-eight".